Thanks Ladies :-)

I can't believe it was a simple pressure issue. It certainly looked inflated, but when I checked, it was only at 35psi...

anyway, so now they're at 70. and are not flat when i'm on it! and I no longer feel like a cow. well, not today anyway.



but it's interesting to know that your friend needed stronger tires ...he's only 40lbs heavier than me... so i think i will call trek or my lbs and ask what the recommend for my weight though...

thanks:-)